How to save states of runtime controls?

Question

I have divided a form in two parts, first half contains a tree view control, in the next half there is a panel control, on that I draw some controlls like check box, radio button, combo box, numeric up down, etc. at runtime, corresponding to the node click of the tree view control. In this case how and where should I store the status of each control? e.g. If there is a check box and a combo box corresponding to the node 1 and I click node 2, before drawing the controlls corresponding to node 2 on the panel, where should I save the status of the controls corresponding to node 1 such that when I again click node 1 , I should again get the old status of the controlls corresponding to it.